1 /* $NetBSD: integrator_machdep.c,v 1.68 2011/07/01 20:39:34 dyoung Exp $ */ 2 3 /* 4 * Copyright (c) 2001,2002 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997,1998 Mark Brinicombe. 34 * Copyright (c) 1997,1998 Causality Limited. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Mark Brinicombe 48 * for the NetBSD Project. 49 * 4. The name of the company nor the name of the author may be used to 50 * endorse or promote products derived from this software without specific 51 * prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 54 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 55 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 57 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 59 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * Machine dependent functions for kernel setup for integrator board 66 * 67 * Created : 24/11/97 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: integrator_machdep.c,v 1.68 2011/07/01 20:39:34 dyoung Exp $"); 72 73 #include "opt_ddb.h" 74 #include "opt_pmap_debug.h" 75 76 #include <sys/param.h> 77 #include <sys/device.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/exec.h> 81 #include <sys/proc.h> 82 #include <sys/msgbuf.h> 83 #include <sys/reboot.h> 84 #include <sys/termios.h> 85 #include <sys/ksyms.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #include <dev/cons.h> 90 91 #include <machine/db_machdep.h> 92 #include <ddb/db_sym.h> 93 #include <ddb/db_extern.h> 94 95 #include <machine/bootconfig.h> 96 #include <sys/bus.h> 97 #include <machine/cpu.h> 98 #include <machine/frame.h> 99 #include <machine/intr.h> 100 #include <arm/undefined.h> 101 102 #include <arm/arm32/machdep.h> 103 104 #include <evbarm/integrator/integrator_boot.h> 105 106 #include "pci.h" 107 #include "ksyms.h" 108 109 void ifpga_reset(void) __attribute__((noreturn)); 110 111 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 112 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 113 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 114 115 /* 116 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 117 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 118 */ 119 #define KERNEL_VM_SIZE 0x0C000000 120 121 /* 122 * Address to call from cpu_reset() to reset the machine. 123 * This is machine architecture dependent as it varies depending 124 * on where the ROM appears when you turn the MMU off. 125 */ 126 127 u_int cpu_reset_address = (u_int) ifpga_reset; 128 129 /* Define various stack sizes in pages */ 130 #define IRQ_STACK_SIZE 1 131 #define ABT_STACK_SIZE 1 132 #define UND_STACK_SIZE 1 133 134 BootConfig bootconfig; /* Boot config storage */ 135 char *boot_args = NULL; 136 char *boot_file = NULL; 137 138 vm_offset_t physical_start; 139 vm_offset_t physical_end; 140 141 /*int debug_flags;*/ 142 #ifndef PMAP_STATIC_L1S 143 int max_processes = 64; /* Default number */ 144 #endif /* !PMAP_STATIC_L1S */ 145 146 /* Physical and virtual addresses for some global pages */ 147 pv_addr_t irqstack; 148 pv_addr_t undstack; 149 pv_addr_t abtstack; 150 pv_addr_t kernelstack; 151 152 vm_offset_t msgbufphys; 153 154 extern u_int data_abort_handler_address; 155 extern u_int prefetch_abort_handler_address; 156 extern u_int undefined_handler_address; 157 158 #ifdef PMAP_DEBUG 159 extern int pmap_debug_level; 160 #endif 161 162 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 163 164 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 165 #define KERNEL_PT_KERNEL_NUM 2 166 /* L2 tables for mapping kernel VM */ 167 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 168 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 169 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 170 171 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 172 173 /* Prototypes */ 174 175 static void integrator_sdram_bounds (paddr_t *, psize_t *); 176 177 void consinit(void); 178 179 /* A load of console goo. */ 180 #include "vga.h" 181 #if NVGA > 0 182 #include <dev/ic/mc6845reg.h> 183 #include <dev/ic/pcdisplayvar.h> 184 #include <dev/ic/vgareg.h> 185 #include <dev/ic/vgavar.h> 186 #endif 187 188 #include "pckbc.h" 189 #if NPCKBC > 0 190 #include <dev/ic/i8042reg.h> 191 #include <dev/ic/pckbcvar.h> 192 #endif 193 194 #include "com.h" 195 #if NCOM > 0 196 #include <dev/ic/comreg.h> 197 #include <dev/ic/comvar.h> 198 #ifndef CONCOMADDR 199 #define CONCOMADDR 0x3f8 200 #endif 201 #endif 202 203 /* 204 * Define the default console speed for the board. This is generally 205 * what the firmware provided with the board defaults to. 206 */ 207 #ifndef CONSPEED 208 #define CONSPEED B115200 209 #endif 210 #ifndef CONMODE 211 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 212 #endif 213 214 int comcnspeed = CONSPEED; 215 int comcnmode = CONMODE; 216 217 #include "plcom.h" 218 #if (NPLCOM > 0) 219 #include <evbarm/dev/plcomreg.h> 220 #include <evbarm/dev/plcomvar.h> 221 222 #include <evbarm/ifpga/ifpgamem.h> 223 #include <evbarm/ifpga/ifpgareg.h> 224 #include <evbarm/ifpga/ifpgavar.h> 225 #endif 226 227 #ifndef CONSDEVNAME 228 #define CONSDEVNAME "plcom" 229 #endif 230 231 #ifndef PLCONSPEED 232 #define PLCONSPEED B38400 233 #endif 234 #ifndef PLCONMODE 235 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 236 #endif 237 #ifndef PLCOMCNUNIT 238 #define PLCOMCNUNIT -1 239 #endif 240 241 int plcomcnspeed = PLCONSPEED; 242 int plcomcnmode = PLCONMODE; 243 244 #if 0 245 extern struct consdev kcomcons; 246 static void kcomcnputc(dev_t, int); 247 #endif 248 249 /* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257 void 258 cpu_reboot(int howto, char *bootstr) 259 { 260 261 /* 262 * If we are still cold then hit the air brakes 263 * and crash to earth fast 264 */ 265 if (cold) { 266 doshutdownhooks(); 267 pmf_system_shutdown(boothowto); 268 printf("The operating system has halted.\n"); 269 printf("Please press any key to reboot.\n\n"); 270 cngetc(); 271 printf("rebooting...\n"); 272 ifpga_reset(); 273 /*NOTREACHED*/ 274 } 275 276 /* Disable console buffering */ 277 278 /* 279 * If RB_NOSYNC was not specified sync the discs. 280 * Note: Unless cold is set to 1 here, syslogd will die during the 281 * unmount. It looks like syslogd is getting woken up only to find 282 * that it cannot page part of the binary in as the filesystem has 283 * been unmounted. 284 */ 285 if (!(howto & RB_NOSYNC)) 286 bootsync(); 287 288 /* Say NO to interrupts */ 289 splhigh(); 290 291 /* Do a dump if requested. */ 292 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 293 dumpsys(); 294 295 /* Run any shutdown hooks */ 296 doshutdownhooks(); 297 298 pmf_system_shutdown(boothowto); 299 300 /* Make sure IRQ's are disabled */ 301 IRQdisable; 302 303 if (howto & RB_HALT) { 304 printf("The operating system has halted.\n"); 305 printf("Please press any key to reboot.\n\n"); 306 cngetc(); 307 } 308 309 printf("rebooting...\n"); 310 ifpga_reset(); 311 /*NOTREACHED*/ 312 } 313 314 /* Statically mapped devices. */ 315 static const struct pmap_devmap integrator_devmap[] = { 316 #if NPLCOM > 0 && defined(PLCONSOLE) 317 { 318 UART0_BOOT_BASE, 319 IFPGA_IO_BASE + IFPGA_UART0, 320 1024 * 1024, 321 VM_PROT_READ|VM_PROT_WRITE, 322 PTE_NOCACHE 323 }, 324 325 { 326 UART1_BOOT_BASE, 327 IFPGA_IO_BASE + IFPGA_UART1, 328 1024 * 1024, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE 331 }, 332 #endif 333 #if NPCI > 0 334 { 335 IFPGA_PCI_IO_VBASE, 336 IFPGA_PCI_IO_BASE, 337 IFPGA_PCI_IO_VSIZE, 338 VM_PROT_READ|VM_PROT_WRITE, 339 PTE_NOCACHE 340 }, 341 342 { 343 IFPGA_PCI_CONF_VBASE, 344 IFPGA_PCI_CONF_BASE, 345 IFPGA_PCI_CONF_VSIZE, 346 VM_PROT_READ|VM_PROT_WRITE, 347 PTE_NOCACHE 348 }, 349 #endif 350 351 { 352 0, 353 0, 354 0, 355 0, 356 0 357 } 358 }; 359 360 /* 361 * u_int initarm(...) 362 * 363 * Initial entry point on startup. This gets called before main() is 364 * entered. 365 * It should be responsible for setting up everything that must be 366 * in place when main is called. 367 * This includes 368 * Taking a copy of the boot configuration structure. 369 * Initialising the physical console so characters can be printed. 370 * Setting up page tables for the kernel 371 * Relocating the kernel to the bottom of physical memory 372 */ 373 374 u_int 375 initarm(void *arg) 376 { 377 int loop; 378 int loop1; 379 u_int l1pagetable; 380 extern char etext __asm ("_etext"); 381 extern char end __asm ("_end"); 382 paddr_t memstart; 383 psize_t memsize; 384 vm_offset_t physical_freestart; 385 vm_offset_t physical_freeend; 386 #if NPLCOM > 0 && defined(PLCONSOLE) 387 static struct bus_space plcom_bus_space; 388 #endif 389 390 /* 391 * Heads up ... Setup the CPU / MMU / TLB functions 392 */ 393 if (set_cpufuncs()) 394 panic("CPU not recognized!"); 395 396 #if NPLCOM > 0 && defined(PLCONSOLE) 397 /* 398 * Initialise the diagnostic serial console 399 * This allows a means of generating output during initarm(). 400 * Once all the memory map changes are complete we can call consinit() 401 * and not have to worry about things moving. 402 */ 403 404 if (PLCOMCNUNIT == 0) { 405 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 406 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 407 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 408 } else if (PLCOMCNUNIT == 1) { 409 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 410 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 411 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 412 } 413 #endif 414 415 #ifdef VERBOSE_INIT_ARM 416 /* Talk to the user */ 417 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 418 #endif 419 420 /* 421 * Fetch the SDRAM start/size from the CM configuration registers. 422 */ 423 integrator_sdram_bounds(&memstart, &memsize); 424 425 #ifdef VERBOSE_INIT_ARM 426 printf("initarm: Configuring system ...\n"); 427 #endif 428 429 /* Fake bootconfig structure for the benefit of pmap.c */ 430 /* XXX must make the memory description h/w independent */ 431 bootconfig.dramblocks = 1; 432 bootconfig.dram[0].address = memstart; 433 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 434 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER; 435 436 /* 437 * Set up the variables that define the availablilty of 438 * physical memory. For now, we're going to set 439 * physical_freestart to 0x00200000 (where the kernel 440 * was loaded), and allocate the memory we need downwards. 441 * If we get too close to the L1 table that we set up, we 442 * will panic. We will update physical_freestart and 443 * physical_freeend later to reflect what pmap_bootstrap() 444 * wants to see. 445 * 446 * We assume that the kernel is loaded into bank[0]. 447 * 448 * XXX pmap_bootstrap() needs an enema. 449 */ 450 physical_start = bootconfig.dram[0].address; 451 physical_end = 0; 452 453 /* Update the address of the first free 16KB chunk of physical memory */ 454 physical_freestart = ((uintptr_t) &end - KERNEL_BASE + PGOFSET) 455 & ~PGOFSET; 456 if (physical_freestart < bootconfig.dram[0].address) 457 physical_freestart = bootconfig.dram[0].address; 458 physical_freeend = bootconfig.dram[0].address + 459 bootconfig.dram[0].pages * PAGE_SIZE; 460 461 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; loop++) { 462 paddr_t memoryblock_end; 463 464 memoryblock_end = bootconfig.dram[loop].address + 465 bootconfig.dram[loop].pages * PAGE_SIZE; 466 if (memoryblock_end > physical_end) 467 physical_end = memoryblock_end; 468 if (bootconfig.dram[loop].address < physical_start) 469 physical_start = bootconfig.dram[loop].address; 470 471 physmem += bootconfig.dram[loop].pages; 472 } 473 474 #ifdef VERBOSE_INIT_ARM 475 /* Tell the user about the memory */ 476 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 477 physical_start, physical_end - 1); 478 #endif 479 480 /* 481 * Okay, the kernel starts 2MB in from the bottom of physical 482 * memory. We are going to allocate our bootstrap pages downwards 483 * from there. 484 * 485 * We need to allocate some fixed page tables to get the kernel 486 * going. We allocate one page directory and a number of page 487 * tables and store the physical addresses in the kernel_pt_table 488 * array. 489 * 490 * The kernel page directory must be on a 16K boundary. The page 491 * tables must be on 4K boundaries. What we do is allocate the 492 * page directory on the first 16K boundary that we encounter, and 493 * the page tables on 4K boundaries otherwise. Since we allocate 494 * at least 3 L2 page tables, we are guaranteed to encounter at 495 * least one 16K aligned region. 496 */ 497 498 #ifdef VERBOSE_INIT_ARM 499 printf("Allocating page tables\n"); 500 #endif 501 502 #ifdef VERBOSE_INIT_ARM 503 printf("freestart = 0x%08lx, free pages = %d (0x%08x)\n", 504 physical_freestart, physmem, physmem); 505 #endif 506 507 /* Define a macro to simplify memory allocation */ 508 #define valloc_pages(var, np) \ 509 alloc_pages((var).pv_pa, (np)); \ 510 (var).pv_va = KERNEL_BASE + (var).pv_pa; 511 512 #define alloc_pages(var, np) \ 513 (var) = physical_freestart; \ 514 physical_freestart += ((np) * PAGE_SIZE); \ 515 if (physical_freeend < physical_freestart) \ 516 panic("initarm: out of memory"); \ 517 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 518 519 loop1 = 0; 520 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 521 /* Are we 16KB aligned for an L1 ? */ 522 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 523 && kernel_l1pt.pv_pa == 0) { 524 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 525 } else { 526 valloc_pages(kernel_pt_table[loop1], 527 L2_TABLE_SIZE / PAGE_SIZE); 528 ++loop1; 529 } 530 } 531 532 /* This should never be able to happen but better confirm that. */ 533 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 534 panic("initarm: Failed to align the kernel page directory"); 535 536 /* 537 * Allocate a page for the system page mapped to V0x00000000 538 * This page will just contain the system vectors and can be 539 * shared by all processes. 540 */ 541 alloc_pages(systempage.pv_pa, 1); 542 543 /* Allocate stacks for all modes */ 544 valloc_pages(irqstack, IRQ_STACK_SIZE); 545 valloc_pages(abtstack, ABT_STACK_SIZE); 546 valloc_pages(undstack, UND_STACK_SIZE); 547 valloc_pages(kernelstack, UPAGES); 548 549 #ifdef VERBOSE_INIT_ARM 550 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 551 irqstack.pv_va); 552 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 553 abtstack.pv_va); 554 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 555 undstack.pv_va); 556 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 557 kernelstack.pv_va); 558 #endif 559 560 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 561 562 /* 563 * Ok we have allocated physical pages for the primary kernel 564 * page tables 565 */ 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 569 #endif 570 571 /* 572 * Now we start construction of the L1 page table 573 * We start by mapping the L2 page tables into the L1. 574 * This means that we can replace L1 mappings later on if necessary 575 */ 576 l1pagetable = kernel_l1pt.pv_pa; 577 578 /* Map the L2 pages tables in the L1 page table */ 579 pmap_link_l2pt(l1pagetable, 0x00000000, 580 &kernel_pt_table[KERNEL_PT_SYS]); 581 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 582 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 583 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 584 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 585 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 586 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 587 588 /* update the top of the kernel VM */ 589 pmap_curmaxkvaddr = 590 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("Mapping kernel\n"); 594 #endif 595 596 /* Now we fill in the L2 pagetable for the kernel static code/data */ 597 { 598 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 599 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 600 u_int logical; 601 602 textsize = (textsize + PGOFSET) & ~PGOFSET; 603 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 604 605 logical = 0x00200000; /* offset of kernel in RAM */ 606 607 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 608 logical, textsize, VM_PROT_READ | VM_PROT_WRITE, 609 PTE_CACHE); 610 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 611 logical, totalsize - textsize, 612 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 613 } 614 615 #ifdef VERBOSE_INIT_ARM 616 printf("Constructing L2 page tables\n"); 617 #endif 618 619 /* Map the stack pages */ 620 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 621 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 623 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 625 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 627 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 628 629 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 630 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 631 632 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 633 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 634 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 635 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 636 } 637 638 /* Map the vector page. */ 639 #if 1 640 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 641 the cache-clean code there. */ 642 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 643 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 644 #else 645 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 #endif 648 649 /* Map the statically mapped devices. */ 650 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 651 652 /* 653 * Now we have the real page tables in place so we can switch to them. 654 * Once this is done we will be running with the REAL kernel page 655 * tables. 656 */ 657 658 /* Switch tables */ 659 #ifdef VERBOSE_INIT_ARM 660 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 661 #endif 662 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 663 cpu_setttb(kernel_l1pt.pv_pa); 664 cpu_tlb_flushID(); 665 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 666 667 /* 668 * Moved from cpu_startup() as data_abort_handler() references 669 * this during uvm init 670 */ 671 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 672 673 #ifdef PLCONSOLE 674 /* 675 * The IFPGA registers have just moved. 676 * Detach the diagnostic serial port and reattach at the new address. 677 */ 678 plcomcndetach(); 679 #endif 680 681 /* 682 * XXX this should only be done in main() but it useful to 683 * have output earlier ... 684 */ 685 consinit(); 686 687 #ifdef VERBOSE_INIT_ARM 688 printf("bootstrap done.\n"); 689 #endif 690 691 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 692 693 /* 694 * Pages were allocated during the secondary bootstrap for the 695 * stacks for different CPU modes. 696 * We must now set the r13 registers in the different CPU modes to 697 * point to these stacks. 698 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 699 * of the stack memory. 700 */ 701 #ifdef VERBOSE_INIT_ARM 702 printf("init subsystems: stacks "); 703 #endif 704 705 set_stackptr(PSR_IRQ32_MODE, 706 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 707 set_stackptr(PSR_ABT32_MODE, 708 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 709 set_stackptr(PSR_UND32_MODE, 710 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 711 712 /* 713 * Well we should set a data abort handler. 714 * Once things get going this will change as we will need a proper 715 * handler. 716 * Until then we will use a handler that just panics but tells us 717 * why. 718 * Initialisation of the vectors will just panic on a data abort. 719 * This just fills in a slightly better one. 720 */ 721 #ifdef VERBOSE_INIT_ARM 722 printf("vectors "); 723 #endif 724 data_abort_handler_address = (u_int)data_abort_handler; 725 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 726 undefined_handler_address = (u_int)undefinedinstruction_bounce; 727 728 /* Initialise the undefined instruction handlers */ 729 #ifdef VERBOSE_INIT_ARM 730 printf("undefined "); 731 #endif 732 undefined_init(); 733 734 /* Load memory into UVM. */ 735 #ifdef VERBOSE_INIT_ARM 736 printf("page "); 737 #endif 738 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 739 740 /* Round the start up and the end down to a page. */ 741 physical_freestart = (physical_freestart + PGOFSET) & ~PGOFSET; 742 physical_freeend &= ~PGOFSET; 743 744 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 745 paddr_t block_start = (paddr_t) bootconfig.dram[loop].address; 746 paddr_t block_end = block_start + 747 (bootconfig.dram[loop].pages * PAGE_SIZE); 748 749 if (loop == 0) { 750 block_start = physical_freestart; 751 block_end = physical_freeend; 752 } 753 754 755 uvm_page_physload(atop(block_start), atop(block_end), 756 atop(block_start), atop(block_end), 757 (bootconfig.dram[loop].flags & BOOT_DRAM_PREFER) ? 758 VM_FREELIST_DEFAULT : VM_FREELIST_DEFAULT + 1); 759 } 760 761 /* Boot strap pmap telling it where the kernel page table is */ 762 #ifdef VERBOSE_INIT_ARM 763 printf("pmap "); 764 #endif 765 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 766 767 /* Setup the IRQ system */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("irq "); 770 #endif 771 ifpga_intr_init(); 772 773 #ifdef VERBOSE_INIT_ARM 774 printf("done.\n"); 775 #endif 776 777 #ifdef DDB 778 db_machine_init(); 779 if (boothowto & RB_KDB) 780 Debugger(); 781 #endif 782 783 /* We return the new stack pointer address */ 784 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 785 } 786 787 void 788 consinit(void) 789 { 790 static int consinit_called = 0; 791 #if NPLCOM > 0 && defined(PLCONSOLE) 792 static struct bus_space plcom_bus_space; 793 #endif 794 #if 0 795 char *console = CONSDEVNAME; 796 #endif 797 798 if (consinit_called != 0) 799 return; 800 801 consinit_called = 1; 802 803 #if NPLCOM > 0 && defined(PLCONSOLE) 804 if (PLCOMCNUNIT == 0) { 805 ifpga_create_io_bs_tag(&plcom_bus_space, 806 (void*)UART0_BOOT_BASE); 807 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 808 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 809 panic("can't init serial console"); 810 return; 811 } else if (PLCOMCNUNIT == 1) { 812 ifpga_create_io_bs_tag(&plcom_bus_space, 813 (void*)UART0_BOOT_BASE); 814 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 815 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 816 panic("can't init serial console"); 817 return; 818 } 819 #endif 820 #if (NCOM > 0) 821 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 822 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 823 panic("can't init serial console @%x", CONCOMADDR); 824 return; 825 #endif 826 panic("No serial console configured"); 827 } 828 829 static void 830 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 831 { 832 volatile unsigned long *cm_sdram 833 = (volatile unsigned long *)0x10000020; 834 volatile unsigned long *cm_stat 835 = (volatile unsigned long *)0x10000010; 836 837 *memstart = *cm_stat & 0x00ff0000; 838 839 /* 840 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 841 * to access the entire bank. 842 */ 843 switch ((*cm_sdram >> 2) & 0x7) 844 { 845 case 0: 846 *memsize = 16 * 1024 * 1024; 847 break; 848 case 1: 849 *memsize = 32 * 1024 * 1024; 850 break; 851 case 2: 852 *memsize = 64 * 1024 * 1024; 853 break; 854 case 3: 855 *memsize = 128 * 1024 * 1024; 856 break; 857 case 4: 858 /* With 256M of memory there is no wrap-around. */ 859 *memsize = 256 * 1024 * 1024 - *memstart; 860 break; 861 default: 862 printf("CM_SDRAM retuns unknown value, using 16M\n"); 863 *memsize = 16 * 1024 * 1024; 864 break; 865 } 866 } 867